Carving machine



C. A. OVESON.

CARVING MACHINE.

APPucATloN FILED Aue. l. 1912s..

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CARVING MACHINE.

APPLICATION FILED Au'G.1. 191s.

1,4356 1 9, Patented NOV. M, 1922.

6 SHEETS-SHEET 2.

I cmzy 0mm@ MMM @W C. A. OVESON.

. CARVING MACHINE.

APPLICATION man AUGJ. 19m.

Patented Nov. ML, 1922.

6 SHEETS-SHEET 3- c. A. .0vEs0N. K CARVING MACHINE.

APPLICATION FILED AUG.I| 1918- I Patented Nov. M, 1922.

6 SHEETS-SHEEI 4 IQ. i

Sgm.

C. A. OVESON.

CARVING MACVHINE. 'APPLICATION FILED Auw. 191-8.

Patented Nov. M, 1922.

6 SHEETS-SHEET 5.

mw @E www @s C. A. OVESON.

CARVING MACHINE.

APPLICATION msn Aue.1.1918.

l1 ,435,6 1 9 Patented Nov. M, 11.922.

6 SHEETS-SHEET 6.

Patented Nov. 14, 1922.

S, ASSIGNOR TO HERBERT S. MILLS, OF

CHICAS-0, ILLINOIS.

CARVING MACHINE.

Application led August 1, 1918. Serial No. 247,813.

To (AZZ whom t may concern.'y

Be it known that I, CARL A. GVESON, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Carving Machines, 'of which thefollowing is a specification.

My invention relates, more particularly., to improvements in carvingmachines for carving objects from pieces of material, as for examplewood, of the type employing a pattern-follower and cutter operativelyconnected together to co-operate with a pattern and the worlr'to beoperated on; and my primary object is to simplify machines of this typeas hitherto constructed and render their operation more positive.

Referring to the accompanyingdrawings:

Figure 1 is a plan view of my improved machine. Fig. 2 is an enlargedsection taken at the line 2 on Fig. 1 and viewed in the direction of thearrow, the work-carrying rotatable head being shown by a face view. Fig.8 is a .section taken at the line 3 on Fig. 1 and the line 8 3 on Fig. 2and viewed in the direction of the arrows. Fig. 4 is a sectional view ofthe work produced by the particular construction of machine illustrated.Fig. 5 is a section taken at the line 5 on Fig. 1 and viewed in thedirection of the arrow, this view being a face view of the templet orpattern-carrying rotatable head. Fig. 6 is a section taken at the line 6on Fig. 1 and the line 6 6 on Fig. 5 and viewed in the direction of thearrows. Fig. 7 is a section taken at the line 7 on Fig. 5 and viewed inthe direction of the arrow. Fig. 8 is an enlarged section taken at theline 8 on Fig. 6 and viewed in the direction of the arrow. Fig. 9 is asection taken at the line 9 9 on Fig. 1 and viewed in the direction ofthe arrows. Fig. 10 is a broken plan view ofa detail showing one of thesimilar bearings for the pattein-and-workcarrying shaft, with anadjustable device for releasably holding` this shaft in shiftedposition. Fig. 11 is an enlarged section taken at the line 11 on Fig. 1and viewed in the direction of the arrow. Fig. 12 is an enlarged sectiontaken at the line 12 on Fig. 1 and viewed in the direction of the arrow.Fig. 13 is an enlarged section taken at the line 13 on Fig. 1 and viewedin the direction of the arrow. Fig. 14 is a section taken at the line 14on Fig. 13 and viewed in the di- 'tion taken at the line `the travel ofthe patterns against rection of the arrow. Fig. 15 is a plan sec- 15--15on Fig. 9 and viewed in the direction of the arrows. Fig. 16 is a brokensection taken at the line 16 on Fig. 15 and viewed in the direction ofthe arrow. Fig. 17 is a broken section taken at the line 17 on Fig. 15and viewed in the direction of the arrow; and Fig. 18, a view of themachine in side elevation.

The frame of the machine is formed of the uprights 19, 20, 2l, and 22.the longitudinally-extending members 23, 24, 25, and 26, and the crossmembers 27, 28, 29, 30, 31, and 32. The frame thus provided carries nearone end, a shaft 33 which extends transversely thereof, this shaft beingrotatable and longitudinally shiftable as hereinafter described. Theshaft 33 carries a disksliaped head 34 rigidly secured thereto andprovided with means for supporting, and presenting to a follower devicehereinafter described, the patterns or templets corresponding to theform of the object, or objects, to be produced by the machine. The shaft33 also supports the material from which the work is to be produced, thesupport for this purpose comprising a. diskshaped head 35 rigidlyconnected with the shaft 33 to be rotatable therewith, the workhereinafter referred to and carried by this disk, being caused to travelinto a position where it is progressively acted on by a cutting toolhereinafter described.

It may be here stated that the patterns on the head Sil and the work onthe head 35 are caused to rotate with the shaft 33 and shift with thelatter lengthwise of the shaft in the pattern-follower, these heads andthe patternfollower and cutter being so arranged that as the shaft 33rotates, there is relative movement of these parts .for producing' afeeding action, the follower and cutter in the particular constructionof machine illustrated, gradually moving toward the shaft 33.

The particular construction of machine illustrated is designed for thecarving of the back and front portions of violin bodies and in thisparticular arrangement I provide four templets or patterns, onerepresented at 36 for the outside of the back, another represented at 37for the inside of the back, another represented at 38 for the outside ofthe front, and another' represented at 39 for the inside of the front,these patterns being provided on a face of the disk-head 34 in groupedrelation about the shaft vand preferably equi-distantly spaced apart.The patterns referred to are provided as integral parts of the head 34,it being understood that the patterns 36 and 38 are offset outwardlyfrom the face of the disk 34as shown in Fig. 6, whereas the patterns 37and 39 are inset relative to the face of this head, as represented ofthe pattern 39 in Fig. 7. The work-carrying head 35 is so constructed asto present on the face thereof, corresponding with the fac'e of the head34 carrying the patterns 36, 37, 38, and 39, the pieces of wood, orother material, from which the front and back portions of the violinbodies are to be constructed, these pieces being supported on the head35 in the same relative positions as the patterns referred to. In Fig.2, I have illustrated a desirable arrangement of devices for holding thepieces of work on the head These comprise the frame-works 40 secured toa face of the head 35, each frame 40 being formed of four frame members41, 42, 43, and '44, the frame members 41, 42, and 43 being rigidly andstationarily secured to the head 35, and the member 44 being pivotallyconnected to the head 35, as indicated at 45 and releasably held inclosed position by a catch device 46. The frame-works 40 thus provided,are adapted to securely hold the pieces of wood, or other material fromwhich the articles are to be formed, and to this end the pieces referredto and represented at 47, engage at grooves 48 provided therein entirelyaround their outside edges, with inwardly-extending flanges 49 providedon the members of the frames 40. inasmuch as one end of a violin body iswider than its opposite end, the pieces 47 are preferably provided ofthe form shown in Fig. 2 and the frames 40 are correspondingly shaped asshown, the end members 41 and 43 of these frames preferably beingparallel tolpermit of the assembling of the pieces 47 with thework-holding meansby sliding them into engagement with the flanges onthese members.

The shaft 33 is provided at opposite ends with pairs of collars 50 and51 rigid therewith and spaced apart, these collars being located atopposite sides of a roller-hearing,

the casing of which is represented at 52 and the interposed rollers at53, the collars `50 and 51 being of greater diameter than the casing 52.Bearing casings 52 rest at their lower flattened portions 54 on bearingblocks 55 supported on the frame of the machine, and are partlyencircled by strap devices 56 secured to these bearing blocks as by thebolts 57, and the casings 52 carry upwardlyeXtended screw devices 58,the heads of which travel in slots 59 in the strap members '56. Theconstruction just described provides for the journaling of the shaft 33in a manner to permit it to rotate, but also permitting it to be shiftedlongitudinally or,

vin other words, crosswise of the machine.

In order that the patterns on the head 34 be constantly forced towardthe pattern-follower hereinafter referred to and maintained inengagement therewith, I provide means for yieldingly forcing the shaft.33, with the parts carried thereby, to the left in Fig. 9, these meansin the particular construction shown,comprising a spring 60 connected atone end, as indicated at 61, with the plate 62 secured to the framemember 23 and at its opposite end with an adjusting` device 63 carriedby a lever 64 pivoted at one end, as indicated at 65, to a bracket 66 onthe frame member 23 and equipped at its opposite end with a bearingmember 67 pivoted thereto at 68, and extending at its conical bearingend 69 into a similarly shaped recess 70 in one end of the shaft 33.

rEhe pattern-follower and cutter represented at 71 and 72, respectively,for co-operation with the patterns and work, are mounted ona carriage 73which is supported and slidable along parallel rods 74 and 75 secured attheir opposite ends in the frame'members 27 and 29 and extending atright angles to the shaft 33. The cutter 72 is formed of a shaft 76journaled in bearings 77 and 78 on the carriage 73, this shaftpreferably being parallel with the guiderods 74 and 75 and carrying atits outer end, a cutter-head 79 presenting cutting edges on itsperiphery, the shaft 76 being provided wit-h a pulley 80 connected by abelt 81 with a pulley 82 fixed on a shaft 83 carrying a fixed pulley 84and an idler 85 with which coi-operates a belt 86 driven from anysuitable source of power, this belt co-operating with a. belt-shiftercomprising a longitudinally-shiftable rod 87 carrying arms 88 spacedapart and straddling the belt 86 for shifting the belt'from one to theother of the pulleys 84 and 85, as desired. The pattern-follower 71 ispreferably in the form of a flattened sphere as represented, and iscarried bya shaft 89 rotatable in bearings 90 and 91 on the carriagev73. The bearing 91 is pivotally connected at a bearing stud 92 thereonwith a plate 93 rigidly secured to the body of the carriage 73 to permitof the pivotal adjustment of the shaft 89, the bearing at the oppositeend of the shaft comprising a bearing block 94 sljidably confined in ayoke 95 and engaging with the threaded portion 96 of an adjusting screw97 j ournaled in the upright wall 98 of the yoke 95, wherebythe'pattern-follower 71 may be adjusted relative' to the face of thehead 34.

The carriage 73 is connected with means for feeding it to the right inFig. 1 during the rotation of the shaft 33, these means,

`nassie as shown, comprising a threaded shaft 99 journaled at itsopposite ends on the cross members 29 and 31, this shaft carrying abevel pinion 100 meshing with a bevel pinion 101 on a vertical shaft 102journaled on the machine and carrying a gear 103 meshing with a worm 104fixed on a shaft 105 journaled in bearings 106 on the frame members 24and 26, this shaft carrying a worm wheel 107 meshing with a worm 108 onthe shaft 83, the shaft also carrying a sheave 109 connected by a belt110 with a sheave groove 111 provided about the periphery of the head34, for driving the shaft 33 and the parts carried thereby. rlhethreaded rod 99 engages a split nut represented in Figs. 13 and 14 andcomprising the bar sections 112 and 113 arranged side by side andslidable up and down in a guideway 114 on the carriage, and upper andlower nut sections 115 and 116 carried by the bars 112 and 113,respectively. The bars 112 and 113 are provided with cut-out portionsequipped with racks 117 which engage a pinion 118 fixed on a shaft 119journaled on the carriage 73 and provided with an operating handle 120for moving the sections of the nut into and out of intermeshing threadedengagement with the threads on the rod A99.

The driving of the shaft 83 for operating the cutter device 72 andshifting the carriage 73 relative to the heads 34 and 35, is controlledthrough the medium of the belt shifting device hereinbefore referred to,this device, for its operation, co-operating with mechanism forshifting'it and, in the particular construction illustrated, comprisinga block 121 lixed on the rod 87 and carrying a pin 122 extending into aslot 123 in an arm 124 xed on a shaft 125 journaled in bearings 126 onthe frame of the inachine, and a lever 127 rigid on the shaft 125 andconnected with one end of a coil spring 128, the opposite end of thisspring being connected with a bracket 129 on the framework of themachine, this spring tending to shift the handle 127 to the dottedposition shown in Fig. 16 and in such movement shifting the belt shifterto the dotted position shown in Fig 15, in which the belt 86 isdisengaged from the fixed pulley 84 and engages the idle pulley 85. Theframe member 25 is provided at its underside with a catch device in theform of a bell crank lever 130 pivoted to this frame member, asindicated at 131 and formed with a shoulder 132 which, under the actionof a leaf spring 133 secured at one end to an extension of the lever 130and at its opposite end confined between pins 134 depending from theframe member 25, normally extends into a position wherein it interlockswith the lever 127 in the full line position represented in Fig. 16 inwhich the belt 86 drives the fixed the parts just described being soproporn tioned that the cutter 72 and feed of the carriage 73 will beautomatically discontinued after the final cut has occurred.

The operation of the machine is as follows:l

rlhe machine is shown in the drawings in the position it assumes at thebeginning of the operation. 1n this position of the machine, the head 34under the action of the sprinO 60, is forced into engagement with theperiphery of the pattern-follower 71 and the carriage 73 is positionedat the lefthand end of the machine as shown in F ig. 1; the beltshifting means are in a position for driving the fixed pulley 84 inwhich position the handle 127 is interlocked with the catch device 130(Figs. 1 and 16), and the split nut device formed of the sections 115pand 116 are in engagement with the threaded rod 99. Iii this positionof the parts, the cutter device 72 and the shaft 33, together with theparts carried by the latter. are rotated from the pulley 82 and thesheave 109 and the screw rod 99 is rotated through the medium of theshaft 102. In the rotation of the heads 34 and 35, under the gradualfeeding of the pattern-follower 71 and'cutter device 72 toward the shaft33, the pattern-follower 71 travels across the patterns 36, 37, 38, and39, and in so doing, by reason of the laterali rigidity thereof, causesthe shaft 33 and with it the heads 34 and 35, to shift lengthwise in onedirection or the other, depending on the engagement of thepat-tern-follower with an offset or insert portion of the pattern. rlhehead 35 carrying the work being rigidly fixed on the shaft 33, theshifting of the latter as stated, produces a corresponding shifting ofthe pieces of work on the head 35 relative to the cutteredevice 72 andthus the exposed faces of the pieces 47 of the work are cut away topresent the form of the respective patterns which they oppose, theoutline of tions presented by the pieces of work when the cuttingoperation referred to is completed, being represented b v dotted linesin Fig. 2. As soon as the carriage 73 reaches a point in its movementtoward the shaft 33, where the final cutting is completed, the tappet136 strikes the arm 135 of the lever 130, thereby releasing the handle127 which, under the action of the spring 128, swings to the right inFig. 16 and shifts the belt the raised or depressed por- 86 from thepulley 84 to Jmember25 and adapted lposition for eingaging` the lefthandend of `leasaloly lock the shaft in this position, it

that the machine be equipped 137 pivoted at 138 to the frameto be swunginto a is lpreferred with, a lever when this shaft is the shaft 33 in Fig. 9

the free shifted to the right in this figure,

end of the lever engaging a stop pin 1397-on the frame-member 25 forholding this lever in the position stated. The operator then rotates theshaft 109, by means of the handle 120 to disengage the split nut fromthe threaded shaft 99 and then bodily shifts the carriage 73 to the leftin Fig. 1'to the position therein shown. The pieces of Work which havebeen carved or fashioned on one face only, are then removed from theholders on the head 35, reversed, to turn their opposite sides outwardlyand shifted `tothe next holder to position them for being carved ontheir opposite faces. ln the particular machine shown, each piece ofWork must be shifted from one holder to another inasmuch as it is to befashioned or carved on opposite faces. Thus if a piece of Work is firstapplied to the uppermost holder in Fig. 2, itivould be removedtherefrom, after being carved on its exposed face to form the contourfor the outside of the back of the bodyportion of a violin, thenreversed and positioned in the holder at the extreme righthand side ofFig. 2 in order that its unfashioned face be exposed to the cuttingaction for cutting it to conform l to the desired contour ofthe innerside of the baclrportion of the violin; and if the .tothe shaft 3,3 andcutter i carriage, the number ofpieces of Worlrpropiece `'of Work dwasfashioned ,cnf one face first in the hol-der atthe righthand side-of F1g. 2, it would then be reversed and shifted .tothe uppermost `holrderinFig.ll2 to fashion itsopposite side, and these same changing operationswouldbe effected astothe pieces of Work in the lower-most holder in-Fig.2 and the one at theextreme,lefthand side of this figure. lWith thepieces of Work `thus repositioned, the operator, to again start theymachine into operation for performing the feeding and cuttingoperations, adjusts the split nut on the carriage yto `engage thethreaded rod 99 and swings the lever 127 from-the dotted position inFig. 16 to the vfull line position therein. It Will be readilyunderstood that byl addingother heads 35 devices 72 to .the

duced by the machine, may be increased as desired.

While -have illustrated` and described a particular construction ofvmachineemloodying my invention, I do not Wish to be understood asintending to limit it thereto as the same may be variously modified andaltered Without departing from the `spirit `of my invention, vit being;.my intention to claim my invention as fully and completely as the priorstate of the art Will permit.

llllhat I claim as new and desire to vsecure by Letters Patent is- AWork-holder formed of a support and .membersonsaid .support forminganenclosing frame, each of said members presenting` along substantiallyits entire inner edge a portion or flange offset from said support andadapted to enter grooves in the edges of Work applied to thezholder,certain of said frame members being movablerelative toA others thereof.

cant A. ovnsoN.

